from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker

from app.core.config import settings

# Create DB directory if it doesn't exist
settings.DB_DIR.mkdir(parents=True, exist_ok=True)

engine = create_engine(
    settings.SQLALCHEMY_DATABASE_URL,
    connect_args={"check_same_thread": False}  # Only needed for SQLite
)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)


def get_db():
    """
    Dependency function to get a database session.
    
    Yields:
        Session: SQLAlchemy session
    """
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()